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Asian-Australas J Anim Sci > Volume 10(6); 1997 > Article
Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 1997;10(6): 679-682.
DOI: https://doi.org/10.5713/ajas.1997.679    Published online December 1, 1997.
Effects of experimental Haemonchus contortus infection on red blood cells and white blood cells of growing goats
M. M. R. Howlader, S. S. Capitan, S. L. Eduardo, N. P. Roxas
Abstract
A uniform group of 12 upgraded growing goats aged between 6.0 and 7.5 months were used in this study. They were divided into three groups of T1, T2 and T3. Four animals were randomly allocated to each group. They were infected orally with three levels (0 larva, 5,000 larvae and 10,000 larvae) of infective Haemonchus contortus larvae. Before infection, all animals were housed in individual pens with concrete floors. They were provided with a uniform management. Total red blood cells (RBC) and total white blood cells (WBC) were measured by hemacytometric method. Results showed significant interaction effect of H. contortus infection and duration of infection on red blood cell counts. The RBC counts of animals in treatment groups 2 and 3 showed significantly lower values over the control group from the second fortnight to the end of the study. The overall mean RBC values of groups 1, 2 and 3 were 11.73, 9.70 and 9.12 million/mm3 blood, respectively. H. contortus infectiondid not significantly influence the total leukocyte counts. Worm infection and duration of infection interaction was also absent on WBC counts. However, the time or duration of infection significantly influenced the WBC counts. Fecal egg counts showed patent infections in the infected animals which also indicated by postmortem worm counts.
Keywords: Experimental Infection; Haemonchus contortus; Growing Goat; Red Blood Cell; White Blood Cell


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